【摘 要】
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A domain scaled turbine stage model is proposed to simulate the unsteady flow of the first stage of E3 gas turbine.The paper focused on the moving path of the stator passage vortex near hub endwall th
【机 构】
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School of Mechanical Engineering,Shanghai Jiao Tong University.Shanghai,China;Shanghai Electric Gas
论文部分内容阅读
A domain scaled turbine stage model is proposed to simulate the unsteady flow of the first stage of E3 gas turbine.The paper focused on the moving path of the stator passage vortex near hub endwall through rotor passage.Like stator airfoil wake,the passage vortex sweeps over rotor hub endwall surface.The boundary layer flow close to rotor endwall is disturbed periodically.The flow turbulent kinetic energy is pulsated to increase the heat transfer over endwall surface.Along its path through rotor passage,upstream stator passage vortex is lifted off the endwall surface and dissipated in the mixing with rotor main flow which is responsible for the extra flow loss in the rotor passage.Heat transfer coefficient on rotor endwall is increased close to the blade leading edge due to the dual vortex cores interaction.In the aft half section,endwall heat transfer remain the same level as in steady flow case.
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